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植物研究 ›› 2021, Vol. 41 ›› Issue (2): 312-320.doi: 10.7525/j.issn.1673-5102.2021.02.019

• 研究报告 • 上一篇    

木麻黄SSR-PCR反应体系的建立与优化

李振1,2, 仲崇禄1, 张勇1(), 魏永成1, 孟景祥1   

  1. 1.中国林业科学研究院热带林业研究所,广州 510520
    2.南京林业大学,南京 210037
  • 收稿日期:2020-07-03 出版日期:2021-03-20 发布日期:2021-01-05
  • 通讯作者: 张勇 E-mail:zhangyonggritf@caf.ac.cn
  • 作者简介:李振(1991—),男,博士研究生,主要从事林木种质资源及评价。
  • 基金资助:
    中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2018ZB003);国家自然科学基金项目(31770716)

Establishment and Optimization of SSR-PCR Reaction System for Casuarina

Zhen LI1,2, Chong-Lu ZHONG1, Yong ZHANG1(), Yong-Cheng WEI1, Jing-Xiang MENG1   

  1. 1.Institute of Tropical Forestry,Chinese Academy of Forestry,Guangzhou 510520
    2.Nanjing Forestry University,Nanjing 210037
  • Received:2020-07-03 Online:2021-03-20 Published:2021-01-05
  • Contact: Yong ZHANG E-mail:zhangyonggritf@caf.ac.cn
  • About author:LI Zhen(1991—),male,Ph.D candidates,engaged in research of forest germplasm resources and evaluation.
  • Supported by:
    A Specific Program for National Non-profit Scientific Institutions(CAFYBB2018ZB003);National Natural Science Foundation of China(31770716)

摘要:

为得到木麻黄SSR-PCR反应的最佳体系,以4个种(短枝木麻黄、山地木麻黄、粗枝木麻黄、细枝木麻黄)的24个无性系为材料,采用L16(45)正交设计对影响木麻黄SSR-PCR反应的4个因素(Taq酶、dNTP、Mg2+和引物)在4个水平上进行了优化,并利用直观分析和方差分析两种方法对PCR结果进行评价。结果表明:引物、Mg2+和dNTP均对木麻黄SSR-PCR反应结果有极显著的影响(P<0.01),影响程度由大到小为:引物>Mg2+>dNTP,而Taq酶对扩增结果无显著影响;确定了两种木麻黄SSR-PCR反应体系(体系6和体系15),体系6为1×PCR buffer、2ng模板DNA、0.5 μmol·L-1引物、1.5 mmol·L-1 Mg2+、0.1 mmol·L-1 dNTP、0.5 U Taq酶;体系15为1×PCR buffer、2ng模板DNA、0.5 μmol·L-1引物、1.75 mmol·L-1 Mg2+、0.2 mmol·L-1 dNTP、1.25 U Taq酶,反应体系共10 μL,不足部分用ddH2O补足。从节约成本和降低非特异性产物的角度考虑可将体系6作为最佳体系,体系15为备用体系;本试验所选荧光引物M26、M36的退火温度在52~62℃均可扩增出清晰明亮的条带。为简化操作步骤和减少非特异性产物,可选择60℃作为引物M26、M36的最佳退火温度。

关键词: 木麻黄, SSR-PCR反应体系, 正交设计

Abstract:

In order to obtain the optimal reaction medium of SSR-PCR from casuarina, 24 somaclonal clones from 4 species including Casuarina equisetifoliaC.junghuhnianaC.glauca and C.cunninghamiana, were selected as experimental materials. L16(45) orthogonal design was used to determine the optimum concentrations of four factors(primer, Mg2+, dNTP, Taq polymerase) within four concentration levels in the SSR-PCR reaction system of Casuarina respectively, and visual analysis and analysis of variance were used as evaluation. The results showed as follows: The three factors(primer, Mg2+, dNTP) had significant differences on the SSR-PCR reaction systems(P<0.01) respectively, and the order of significance was primer>Mg2+>dNTP, while Taq polymerase had no significant difference. The two optimal SSR-PCR reaction systems(10 μL) of Casuarina were determined, including system 6, which consisted of 1×PCR buffer, 2ng template DNA, 0.5 μmol·L-1 primer, 1.5 mmol·L-1 Mg2+, 0.1mmol·L-1 dNTP, 0.5 U Taq polymerase, and system 15, which contained 1×PCR buffer, 2 ng template DNA, 0.5 μmol·L-1 primer, 1.75 mmol·L-1 Mg2+, 0.2 mmol·L-1 dNTP, 1.25 U Taq polymerase. The system 6 was better than system 15. 60℃ was determined as the optimal annealing temperature of the fluorescent primers M26 and M36.

Key words: SSR-PCR reaction system, orthogonal design, Casuarina

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